GB2302360A - Windscreen with directly-extruded peripheral polymeric profile - Google Patents
Windscreen with directly-extruded peripheral polymeric profile Download PDFInfo
- Publication number
- GB2302360A GB2302360A GB9612519A GB9612519A GB2302360A GB 2302360 A GB2302360 A GB 2302360A GB 9612519 A GB9612519 A GB 9612519A GB 9612519 A GB9612519 A GB 9612519A GB 2302360 A GB2302360 A GB 2302360A
- Authority
- GB
- United Kingdom
- Prior art keywords
- profile
- pane
- configuration
- glass pane
- glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J10/00—Sealing arrangements
- B60J10/70—Sealing arrangements specially adapted for windows or windscreens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/154—Coating solid articles, i.e. non-hollow articles
- B29C48/155—Partial coating thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J10/00—Sealing arrangements
- B60J10/45—Assembling sealing arrangements with vehicle parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
Abstract
A method and apparatus for extrusion of a polymeric profile on a shaped glass pane each involve use of a mechanism arranged to deposit the profile in a configuration which is pre-programmed in free space and independent of the exact configuration of the pane. In a preferred embodiment, a vehicle windscreen glass 1 is resiliently mounted for movement in a direction normal to the general plane of the windscreen with its periphery biased towards the extrusion nozzle 8 so that the nozzle applies a positive pressure on the periphery opposing said biasing as the profile is applied to the peripheral margin of the glass. The configuration of the resulting profile has a projection on a plane independent of the exact configuration of the pane so that, applied to a vehicle window, the profile may correspond precisely to the required plan despite variations of the shape of the windscreen glass within allowed tolerances.
Description
ImDrovements in or relating to Vehicle Windows
The invention relates to a method for the extrusion of profiles on glass panes to be used as vehicle windows, apparatus for use in the method, and to vehicle windows comprising glass panes equipped with such profiles.
The extrusion of adhesive polymeric profiles directly onto the margin of a glass pane to be used as a vehicle window is described in many prior patent specifications. One of the early patent specifications, EP 0 121 481A1, relates to the use of two superposed strips (profiles) of adhesive polymer, the first being extruded onto the glass and being allowed to cure before the second, which serves to bond the glass pane into a frame in the vehicle, is applied, superposed on the first, immediately prior to installing the pane in the vehicle. The patent specification explains (with reference to Figure 5) that, instead of extruding the first profile, the profile may be formed by injection moulding.In this way, a profile having dimensions which correspond exactly to the required dimensions, i.e. the dimensions of the frame in which the vehicle windows is to be glazed, may be achieved, and the dimensions of the profile do not depend on any variations of the dimensions of the glass pane within allowed tolerances.
We have now found that a similar result may be achieved with a profile extruded in situ onto the glass by extruding the profile onto the glass using a mechanism pre-programmed to extrude the profile in a configuration having a projection on a plane which configuration is predetermined and independent of variations in the shape and dimensions of the glass pane within allowed tolerances.
According to the present invention, there is provided a method of extruding a polymeric profile onto a shaped glass pane comprising advancing an extrusion nozzle supplying the polymeric profile relative to the periphery of the pane by means of a mechanism programmed to deposit the profile in a configuration having a projection on a selected plane which projection is pre-programmed and independent of the exact configuration of the glass pane.
The said plane will usually be substantially parallel to the general plane of the pane, although an alternative plane may be chosen if desired, (for example, when the plan dimensions of the profile projected on to that alternative plane are more important than the plan dimensions of the profile parallel to the general plane of the pane).
The glass pane will normally be mounted so that its projection on said plane is fixed, and preferably with its periphery free to move in a direction substantially noamal to said plane.
The extrusion nozzle may be located at a position having a projection on said plane which is fixed, and the glass moved so that its periphery is advanced past the nozzle.
However, we prefer to mount the extrusion nozzle on a mechanism (for example, a robot) which advances the nozzle around the periphery of the pane, while securing the pane so that its projection on said plane remains fixed.
According to a further aspect of the present invention, there is provided apparatus for extrusion of a polymeric profile on to a glass pane to be used as a vehicle window comprising an extrusion nozzle for applying the extruded profile to the glass pane, means for mounting the glass pane with its projection on a selected plane fixed, means for advancing the extrusion nozzle relative to the periphery of the pane, said means comprising a mechanism programmed to deposit the profile in a configuration which is pre-programmed and independent of the exact configuration of the glass, means for resiliently biassing the extrusion nozzle and mounted pane together in a direction substantially normal to said plane whereby the profile may be deposited in a configuration having a projection on said plane which is pre-programmed and independent of the exact configuration of the glass pane.
The means for mounting the pane may be resilient and biased to urge the mounted pane towards the extrusion nozzle in a direction substantially normal to said plane.
The means for advancing the extrusion nozzle relative to the periphery of the pane may comprise a robot carrying the extrusion nozzle, and the mechanism may be programmed to deposit the profile in a predetermined configuration in free space.
According to a still further aspect of the present invention there is provided, as a novel product, a glass pane for use as a vehicle window having an extruded polymeric profile deposited adjacent the peripheral edge thereof in a configuration having a projection on a selected plane which projection in independent of the exact configuration of the pane.
The invention is illustrated but not limited to the following description of a preferred embodiment shown in the accompanying schematic drawings in which:
Figure 1 is a plan view of a glass pane secured in position on a supporting frame for
application of an extruded profile by a method in accordance with the invention.
Figure 2 is a fragmentary section on the line 2-2 in Figure 1, showing a detail of the
supporting frame with the glass pane removed for clarity.
Figure 3 is a perspective view of a robot advancing an extruding nozzle around the
periphery of a glass pane mounted on a securing frame as illustrated in Figures 1 and 2 to
apply an extruded profile by a method in accordance with the invention.
In the drawings, in which the same parts are designated by the same numerals, a glass pane 1 is mounted on a frame, generally designated 2, which is in turn secured to the top of a table 3.
Referring more particularly to Figure 1, the frarne 2 is, in plan, in the form of a truncated
H having side limbs 4, 6joined by and secured rigidly to interconnecting limb 5, each of limbs 4,5 and 6 being of extruded alloy of hollow section, as illustrated in Figure 2. Frame 2 is restrained against movement parallel to the plane of the table top by guide blocks 10 screwed to the table top 3 and providing a clearance fit with frame members 4,5 and 6 so as to allow for movement of the frame normal to the table top. Frame 2 is mounted on the table top 3 by four like resilient mounting devices 11, 12, 13, 14 secured to the frame adjacent the ends of the side limbs 4,6. Side limb 6 is secured rigidly to resilient mounting device 12 by means of a screw (at position 9 Figure 1).Mounting device 12 (see Figure 2) comprises a steel outer portion 15 telescopically mounted over an inner assembly 16 resting on table top 3. Inner assembly comprises portion 16 a steel locating piece 20 resiliently mounted within a Nylon
(trade mark) lower section 21 and biassed outwardly by coil spring 22 between the locating piece 20 and lower section 21. Outer portion 15 is provided with a threaded adjustment
screw 25 whch engages in a threaded bore 26 in outer portion 15 and is secured in position by
lock nut 27 engaging against the top face 28 of outer portion 15. A threaded locating screw
24 engages in a threaded bore 28 in one side of upper portion 15 and protrudes into a
corresponding groove 29 in lower section 21 of inner assembly 16 to retain outer portion 15
in position and prevent rotation. The locating screw 23 is secured in position by lock nut 30
engaging against the outer face of outer portion 15. Thus one end of side limb 6 is fixed in
position parallel to the plane of the table top 3 by resilient mounting device 14 and upwardly biassed by spring 22, the precise height of the end of side limb 6 being adjustable by means of adjustment screw 25. It will be appreciated that outer portion 15 is free to move down towards the top of table 3, under the action of downward pressure applied through a mounted glass pane to side 6 of frame 2.The other end of side limb 6 and the ends of side limb 4 are similarly secured to resilient mounting devices 11, 13, 14, each fixed in position on table 3, so that frame 2 is fixed in position parallel to the plane of table 3 but each corner of the frame is free to move down towards the table in response to downward pressure applied thereto.
Upwardly facing suction cups 31, 32, 33 and 34 are mounted by mounting blocks (41 in the case of suction cup 31) located on side limbs 6,4 at the corners of frame 2 adjacent the resilient mounting devices 11, 12, 13 and 14, and are connected by a network of ducts 35 to vacuum means (not shown).
Referring to Figure 3, a robot 7 located adjacent table 3 carries an extrusion head 8 with an extrusion nozzle 9 connected by means of ducting (not shown) in conventional manner to a source of extrudable polymeric material capable of extrusion to form the required profile. This may be a thermoplastic material having a melting point above ambient temperature which sets on cooling, in which case the ducting and extrusion head including the extrusion nozzle will normally be heated to keep the thermoplastics material sufficiently fluid for extrusion.
Alternatively, it may be a reactive polymeric material, for example, a material which cures on contact with atmospheric water vapour, such as SIKA 250 PC available in commerce from
Sika AG of Zurich, Switzerland (SIKA is a trade mark). In this latter case, the ducting and extrusion nozzle may similarly be heated in order to control the viscosity and condition of the curable polymeric material.
In use, a glass pane 1 on which a profile is to be extruded is mounted on frame 2 (see
Figure 3). The pane is placed in the required position by locating it against retractable locating stops (not shown) and fixed in position by applying a vacuum through ducts 35 to suction cups 31, 32, 33, 34, and the locating stops retracted. The vacuum is maintained until application of the extruded profile is complete, and thereafter released allowing the pane to be removed.
With the glass pane 2 located in position, the extrusion head is brought into position to begin extrusion of the plastics profile onto the upper face of the glass around the margin thereof. The robot is programmed, in generally known manner, to advance the extrusion head so that the extrusion nozzle moves along a trajectory in free space related (and normally corresponding precisely) to the required peripheral shape of the glass pane, and is positioned so that it continually applies a small positive downward pressure to the periphery of the glass panel. Because the glass pane is resiliently mounted in the direction normal to the plane of the table, the periphery of the pane is depressed towards the table by the pressure applied to the glass by the extrusion head.As the extrusion nozzle moves along its pre-programmed trajectory, the depression of the pane toward the top of table 3 may vary with departures of the exact configuration of the glass pane from the configuration pre-programmed into the robot, with the resilient mounting of the pane compensating for departures of the pane, within allowed tolerances, from its target configuration. When the extrusion nozzle reaches its starting point (or earlier if the extrusion is not required around the full periphery of the pane), extrusion may be discontinued and the extrusion head removed from the glass.Then, either before or after removal of the glass pane from frame 2, the zone of the extrusion around the starting/finishing point may be rectified to correct distortions by a known technique (for example, one of the techniques described in EP 0 421 833 A2 or EP 0 561 743 Al). Before the pane is removed from the frame, the vacuum to suction cups 31, 32, 33 and 34 is released allowing such removal.
Because the profile has been deposited in accordance with a configuration preprogrammed in free space, with departures of the actual configuration of the glass pane from that configuration being compensated for by movement of the pane is a direction normal to the plane of the top of table 3 on the resilient mounting devices, the profile deposited has a projection on the plane of the table top which is pre-programmed and substantially independent
of the exact configuration of the glass. Thus, when the pane is placed in position on the motor
vehicle, its fit against the coachwork of the vehicle (at least in a selected plane) will be
substantially independent of variations in the configuration of the glass within the allowed
tolerances and dependent solely on any departure of the configuration of the coachwork
(which again will be within allowed tolerances) from that prescribed.
Claims (14)
1. A method of extruding a polymeric profile onto a shaped glass pane comprising
advancing an extrusion nozzle supplying the polymeric profile relative to the periphery of
the pane by means of a mechanism arranged to deposit the profile in a configuration
having a projection on a plane which projection is pre-programmed and independent of
the exact configuration of the glass pane.
2. A method as claimed in claim 1 wherein the glass pane is mounted so that the projection
of its periphery on said plane is substantially fixed
3. A method as claimed in claim 1 or 2 wherein the glass pane is mounted so that its
periphery is free to move in a direction substantially normal to said plane.
4. A method as claimed in claim 3 wherein the glass pane is resiliently mounted so that its
periphery is biassed towards said extrusion nozzle and the mechanism is arranged to
apply a positive pressure on said periphery opposing said biassing as the profile is
applied to the peripheral margin of the glass.
5. A method as claimed in any of the preceding claims wherein the mechanism is arranged
to deposit the profile in a configuration which is pre-programmed in free space.
6. A method as claimed in any of the preceding claims wherein the mechanism comprises a
robot carrying the extrusion nozzle.
7. A method of extruding a polymeric profile onto a shaped glass pane wherein the profile
is deposited in a pre-programmed configuration independent of the exact configuration
of the glass pane substantially as hereinbefore described with reference to, and as
illustrated in, Figures 1,2 and 3 of the accompanying drawings.
8. A vehicle window comprising a glass pane and a plastics profile extruded thereon by a
method as claimed in any of the preceding claims.
9. A glass pane for use as a vehicle window have extruded polymeric profile deposited
adjacent the peripheral edge thereof in a configuration having a projection on a selected
plane which projection is independent of the exact configuration of the pane.
10. Apparatus for extrusion of a polymeric profile on to a glass pane to be used as a vehicle
window comprising on extrusion nozzle for applying the extruded profile to the glass
pane, means for mounting the glass pane with its projection on a selected plane fixed,
means for advancing the extrusion nozzle relative to the periphery of the pane, said
means comprising a mechanism programmed to deposit the profile in a configuration
which is pre-programmed and independent of the exact configuration of the glass, means
for resiliently biassing the extrusion nozzle and mounted pane together in a direction
substantially normal to said plane whereby the profile may be deposited in a
configuration having a projection on said plan which is pre-programmed and independent
of the exact configuration of the glass pane.
11. An apparatus as claimed in claim 10 wherein the means for mounting the pane is resilient
and biassed to urge the mounted pane towards the extrusion nozzle in a direction
substantially normal to said plane.
12. An apparatus as claimed in claim 10 or claim 11 comprising a robot carrying the
extrusion nozzle.
13. An apparatus as claimed in any of claims 10 to 12 wherein the mechanism is programmed to deposit the profile in a predetermined configuration in free space.
14. An apparatus for extrusion of a polymeric profile on to a glass pane in accordance with a
configuration having a projection on a selected plane which is predetermined and
independent of the exact configuration of the glass pane substantially as described with
reference to, and as illustrated in Figures 1 to 3 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9512294.1A GB9512294D0 (en) | 1995-06-16 | 1995-06-16 | Improvements in or relating to vehicle windows |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9612519D0 GB9612519D0 (en) | 1996-08-14 |
| GB2302360A true GB2302360A (en) | 1997-01-15 |
Family
ID=10776202
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9512294.1A Pending GB9512294D0 (en) | 1995-06-16 | 1995-06-16 | Improvements in or relating to vehicle windows |
| GB9612519A Withdrawn GB2302360A (en) | 1995-06-16 | 1996-06-14 | Windscreen with directly-extruded peripheral polymeric profile |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9512294.1A Pending GB9512294D0 (en) | 1995-06-16 | 1995-06-16 | Improvements in or relating to vehicle windows |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9512294D0 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787576A2 (en) * | 1996-01-25 | 1997-08-06 | Tai - Tecnologia Automazione Innovazione - Societa Per Azioni | A method for the application and modelling of seal elements in a material extruded onto the surfaces of flat or curved sheets, and an apparatus suitable to carry out said method |
| EP1331080A2 (en) | 2002-01-25 | 2003-07-30 | L & L Products Inc. | Method and apparatus for applying flowable materials like polyurethane or epoxy resin after pretreating the surface with plasma or primer |
| US7180027B2 (en) | 2004-03-31 | 2007-02-20 | L & L Products, Inc. | Method of applying activatable material to a member |
| WO2011001054A1 (en) | 2009-07-03 | 2011-01-06 | Peugeot Citroën Automobiles SA | Device for securing an elongate part on a surface which curves in two directions, and use thereof for securing a trim on a glass panel of a motor vehicle |
| US9987785B2 (en) | 2012-04-26 | 2018-06-05 | Zephyros, Inc. | Applying flowable materials to synthetic substrates |
-
1995
- 1995-06-16 GB GBGB9512294.1A patent/GB9512294D0/en active Pending
-
1996
- 1996-06-14 GB GB9612519A patent/GB2302360A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787576A2 (en) * | 1996-01-25 | 1997-08-06 | Tai - Tecnologia Automazione Innovazione - Societa Per Azioni | A method for the application and modelling of seal elements in a material extruded onto the surfaces of flat or curved sheets, and an apparatus suitable to carry out said method |
| EP0787576A3 (en) * | 1996-01-25 | 1997-12-29 | Tai - Tecnologia Automazione Innovazione - Societa Per Azioni | A method for the application and modelling of seal elements in a material extruded onto the surfaces of flat or curved sheets, and an apparatus suitable to carry out said method |
| EP1331080A2 (en) | 2002-01-25 | 2003-07-30 | L & L Products Inc. | Method and apparatus for applying flowable materials like polyurethane or epoxy resin after pretreating the surface with plasma or primer |
| EP1331080A3 (en) * | 2002-01-25 | 2004-10-27 | L & L Products Inc. | Method and apparatus for applying flowable materials like polyurethane or epoxy resin after pretreating the surface with plasma or primer |
| US7467452B2 (en) | 2002-01-25 | 2008-12-23 | Zephyros, Inc. | Method for applying flowable materials |
| US7180027B2 (en) | 2004-03-31 | 2007-02-20 | L & L Products, Inc. | Method of applying activatable material to a member |
| WO2011001054A1 (en) | 2009-07-03 | 2011-01-06 | Peugeot Citroën Automobiles SA | Device for securing an elongate part on a surface which curves in two directions, and use thereof for securing a trim on a glass panel of a motor vehicle |
| US9987785B2 (en) | 2012-04-26 | 2018-06-05 | Zephyros, Inc. | Applying flowable materials to synthetic substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9612519D0 (en) | 1996-08-14 |
| GB9512294D0 (en) | 1995-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |